I went to a Dear Jane club meeting and several of the ladies suggested that spiral be added to the spine of my book. I took it to Kinko's and they cut off the spine and put a spiral in it. You can get it done at most office supply stores just ask.
It took a few minutes they cut off the spine and put a spiral back. It is so easy to flip and also leave open. So if you have one or more books that you use often doing this to it is worth it.
Check out picture of my Dear Jane books with spiral back!!!
book w/ spiral back